Home / 8,690.62-11,986.68-5,705.36

Finding the Fourth Proportional to 8,690.62, 11,986.68 and 5,705.36

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Solution

The fourth proportional to 8,690.62, 11,986.68 and 5,705.36 is: 7,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.62 : 11,986.68 = 5,705.36 : x
  2. Step 2: Convert to fraction form
    8,690.62/11,986.68 = 5,705.36/x
  3. Step 3: Cross multiply
    8,690.62x = 11,986.68 × 5,705.36
  4. Step 4: Simplify right side
    8,690.62x = 68,388,303.21
  5. Step 5: Solve for x
    x = 68,388,303.21/8,690.62
  6. Step 6: Final answer
    x = 7,869.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.